Vtyjkyuk

I want to set field value of form field in Magento 2.

Actual Result

Expected Result

I have added required code here which are available in my Form.php

<?php
namespace MagenestMembershipBlockAdminhtmlGiftEdit;

class Form extends FormGeneric

 protected $_status;
 protected $_systemStore;
 protected $_wysiwygConfig;
 protected $productGift;

 public function __construct(
 Context $context,
 Registry $registry,
 FormFactory $formFactory,
 GroupRepositoryInterface $groupRepository,
 SearchCriteriaBuilder $searchCriteriaBuilder,
 DataObject $objectConverter,
 SystemStore $systemStore,
 Config $wysiwygConfig,
 ProductGift $productGift,
 array $data = 
 ) 
 $this->_systemStore = $systemStore;
 $this->_groupRepository = $groupRepository;
 $this->_searchCriteriaBuilder = $searchCriteriaBuilder;
 $this->_objectConverter = $objectConverter;
 $this->_wysiwygConfig = $wysiwygConfig;
 $this->productGift = $productGift;
 parent::__construct($context, $registry, $formFactory, $data);
 

 protected function _prepareForm()
 
 $model = $this->_coreRegistry->registry('membership_gift_edit');
 $data = $model->getData();
 $form = $this->_formFactory->create();
 $form->setHtmlIdPrefix('page_');

 $fieldset = $form->addFieldset('base_fieldset', ['legend' => __('Gift')." ".$model->getId()]);

 if ($model->getId()) 
 $fieldset->addField(
 'id',
 'hidden',
 ['name' => 'id']
 );
 


 $fieldset->addField(
 'customer_id',
 'text',
 [
 'label' => __('Customer Id'),
 'title' => __('Customer Id'),
 'name' => 'customer_id',
 'required' => true,
 ]
 );


 $form->setUseContainer(true);
 $form->setAction($this->getUrl('membership/gift/save'));
 $form->setMethod('post');
 $form->setUseContainer(true);
 $form->setId('edit_form');
 $form->setValues($model->getData());
 $this->setForm($form);
 return parent::_prepareForm();
 

I have tried as below but didn't get result.

Try 1:

 $fieldset->addField(
 'customer_id',
 'text',
 [
 'label' => __('Customer Id'),
 'title' => __('Customer Id'),
 'name' => 'customer_id',
 'required' => true,
 ]
 );
$fieldset->setValue('myvalue');

Try 2:

 $fieldset->addField(
 'customer_id',
 'text',
 [
 'label' => __('Customer Id'),
 'title' => __('Customer Id'),
 'name' => 'customer_id',
 'value' => 'test',

 ]
 );

I also refer below link but still facing an issue.
How to set field value of form field in Magento 2

Try this

$fieldset->addField(
 'customer_id',
 'text',
 [
 'label' => __('Customer Id'),
 'title' => __('Customer Id'),
 'name' => 'customer_id',
 'required' => true,
 ]
);

$model->setData('customer_id', '10');

Second way:

You can achieve this using following way also.

$fieldset->addField(
 'customer_id',
 'text',
 [
 'label' => __('Customer Id'),
 'title' => __('Customer Id'),
 'name' => 'customer_id',
 'required' => true,
 'value' => '10',
 ]
);

...
...

 if ($model->getId()) 
 $form->setValues($model->getData());
 
 $this->setForm($form);

setValues() function is overriding the 'value' that you have set for the field.
This line of code which would reset the form values:

$form->setValues($model->getData());

Solution:

Set model data before setValues() function as below:

if (!$model->getId()) 
 $model->setData('customer_id', '19');

$form->setValues($model->getData());

Use below code on same file it will sure work.

$model->setData('customer_id', "20");
 $form->setValues($model->getData());

I did use below code and its work fine for me

$model->setData('title', "yourValue");
 $form->setValues($model->getData());

You can try the below solution as well.

<?php
namespace MagenestMembershipBlockAdminhtmlGiftEdit;

class Form extends FormGeneric

 protected $_status;
 protected $_systemStore;
 protected $_wysiwygConfig;
 protected $productGift;

 public function __construct(
 Context $context,
 Registry $registry,
 FormFactory $formFactory,
 GroupRepositoryInterface $groupRepository,
 SearchCriteriaBuilder $searchCriteriaBuilder,
 DataObject $objectConverter,
 SystemStore $systemStore,
 Config $wysiwygConfig,
 ProductGift $productGift,
 array $data = 
 ) 
 $this->_systemStore = $systemStore;
 $this->_groupRepository = $groupRepository;
 $this->_searchCriteriaBuilder = $searchCriteriaBuilder;
 $this->_objectConverter = $objectConverter;
 $this->_wysiwygConfig = $wysiwygConfig;
 $this->productGift = $productGift;
 parent::__construct($context, $registry, $formFactory, $data);
 

 protected function _prepareForm()
 
 $model = $this->_coreRegistry->registry('membership_gift_edit');
 $data = $model->getData();
 $form = $this->_formFactory->create();
 $form->setHtmlIdPrefix('page_');

 $fieldset = $form->addFieldset('base_fieldset', ['legend' => __('Gift')." ".$model->getId()]);

 if ($model->getId()) 
 $fieldset->addField(
 'id',
 'hidden',
 ['name' => 'id']
 );
 


 $fieldset->addField(
 'customer_id',
 'text',
 [
 'label' => __('Customer Id'),
 'title' => __('Customer Id'),
 'name' => 'customer_id',
 'required' => true,
 'value' => '19'
 ]
 );


 $form->setUseContainer(true);
 $form->setAction($this->getUrl('membership/gift/save'));
 $form->setMethod('post');
 $form->setUseContainer(true);
 $form->setId('edit_form');
 $_data = $model->getData();
 if ($model->getId()) 
 $form->setValues($_data);
 
 $this->setForm($form);
 return parent::_prepareForm();